Tire Size Equivalent Calculator

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…of a tiresize, it signifies the tire is a "Metric" size (also called "Euro-metric" because these sizes originated in Europe). While Metric tiresizes are primarily used on European cars, they are also used on vans and sport utility vehicles. Euro-metric sizes are dimensionally equivalent to…

…depth equivalent spare tire to be used with the remaining three tires. If the spare is not integrated into the vehicle's tire rotation pattern, it will not match the tread depth of the four worn tires on the ground when called into service. Additionally, if a single tire is replaced by the full size…

…and P-metric tires in the same size (i.e. P225/60R16 & 225/60R16) are equivalent in their dimensions with just slight differences in their load capacity calculations and inflation pressure tables. So if Euro-metric and P-metric tires have the same numeric size, the same tire performance category…

…you a tire that fit a particular vehicle's needs perfectly, this approach was not quite as proactive and uniform as creating sizes using a formula. It did work however and created many new sizes that are still in use to this day. Both P-metric and Euro-metric tires with the same calculation (i.e.…